S3227AM SMART3G gas detectors are employed to detect Ammonia, Azane, Hydrogen nitride, Trihydrogen nitride, Nitro-Sil, NH3 Gas compounds (ppm) in classified areas. For the toxic gas detection, Sensitron has operated a reliable selection among the most performing electrochemical cells to supply units representing the state of the art in toxic gas detection. The SMART3G line has been designed to offer a wide range of alternatives that grant customers the best solution to their requirements. SMART3G-D have been designed to meet with tougher industrial requirements and offer a 4 digits back-lit display and 5 mode status LEDs for the gas concentration reading. They feature non intrusive magnetic calibration for an accurate and easy calibration via Hall-effect switches, without opening the instrument and declassifying the area. SMART3GD2 detectors are ATEX certified for: Group II 2G and 2GD with adapterSMART3GD detectors are SIL2 HW TUV certified and SIL3 SW pending